Whisk together instant coffee, sugar, and hot water until peaks are formed. (You can use a hand whisk, a hand mixer or a stand mixer. Your choice)
Fill a glass with ice cubes and top with desired amount of Irish Cream. If you just want a touch of taste go for a teaspoon, but if you like bold flavors you might want to go with an ounce.
Top the rest of your cup with your milk of choice.
Put one to three spoonfuls of the whipped coffee mixture on top.
Shave a piece of chocolate using a lemon zester, garlic grater or cheese grater and sprinkle on top of whipped coffee.